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Galactic white dwarf binaries (WDBs) and black hole binaries (BHBs) will be gravitational wave (GW) sources for LISA. Their detection will provide insights into binary evolution and the evolution of our Galaxy through cosmic history. Here,…

Astrophysics of Galaxies · Physics 2024-10-24 Petra Tang , Jan Eldridge , Renate Meyer , Astrid Lamberts , Guillaume Boileau , Wouter van Zeist

The process whereby the supermassive black holes populating the centers of galaxies have been assembled remains to be established, with the relative importance of seeds provided by collapsed Population-III stars, black holes formed in…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-19 John Ellis , Malcolm Fairbairn , Juan Urrutia , Ville Vaskonen

The observed binary black hole (BBH) mergers indicate a large Galactic progenitor population continuously evolving from large orbital separations and low gravitational wave (GW) frequencies to the final merger phase. We investigate the…

High Energy Astrophysical Phenomena · Physics 2019-04-19 Xiao Fang , Todd A. Thompson , Christopher M. Hirata

We examine massive black hole (MBH) mergers and their associated gravitational wave signals from the large-volume cosmological simulation Astrid. Astrid includes galaxy formation and black hole models recently updated with a MBH seed…

Coalescing massive black hole binaries are produced by the mergers of galaxies. The final stages of the black hole coalescence produce strong gravitational radiation that can be detected by the space-borne LISA. In cases where the black…

Gravitational waves (GWs) offer an unprecedented opportunity to survey the sky and detect mergers of compact objects. While intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt with either dynamical or…

High Energy Astrophysical Phenomena · Physics 2022-11-16 Giacomo Fragione

Merging supermassive black hole binaries is expected as a consequence of galaxy mergers, yet the detailed evolution path and underlying merging mechanisms of these binaries are still subject to large theoretical uncertainties. In this work,…

General Relativity and Quantum Cosmology · Physics 2023-06-29 Yun Fang , Huan Yang

Gravitational waves emitted by merging black holes between $\sim 10^4-10^7~M_\odot$ will be detectable by the Laser Interferometer Space Antenna (LISA) with signal-to-noise ratios of several hundred out to redshift 20. Supermassive black…

Astrophysics of Galaxies · Physics 2021-10-04 Fazeel Mahmood Khan , Kelly Holley-Bockelmann

Theoretical models for the expected merger rates of intermediate-mass black holes (IMBHs) are vital for planned gravitational-wave detection experiments such as the Laser Interferometer Space Antenna (LISA). Using collisionless $N$-body…

The dynamical formation of stellar-mass black hole-black hole binaries has long been a promising source of gravitational waves for the Laser Interferometer Gravitational-Wave Observatory (LIGO). Mass segregation, gravitational focusing, and…

High Energy Astrophysical Phenomena · Physics 2016-06-30 Ryan M. O'Leary , Yohai Meiron , Bence Kocsis

The coalescence of compact binaries containing neutron stars or black holes is one of the most promising signals for advanced ground-based laser interferometer gravitational-wave detectors, with the first direct detections expected over the…

High Energy Astrophysical Phenomena · Physics 2015-09-02 Simon Stevenson , Frank Ohme , Stephen Fairhurst

Supermassive black hole binaries (SMBHBs) with masses in the range 10^4-10^7 M_sun/(1+z), produced in galaxy mergers, are thought to complete their coalescence due to the emission of gravitational waves (GWs). The anticipated detection of…

Astrophysics · Physics 2009-11-13 Zoltán Haiman , Bence Kocsis , Kristen Menou , Zoltán Lippai , Zsolt Frei

The growing number of binary black hole mergers detected through gravitational waves offers unprecedented insight into their underlying population, yet their astrophysical formation channels remain unresolved. We present a new method to…

General Relativity and Quantum Cosmology · Physics 2025-10-23 William J. Smith , Krystal Ruiz-Rocha , Kelly Holley-Bockelmann , Michela Mapelli , Karan Jani

The study of the dynamical evolution of massive black hole pairs in mergers is crucial in the context of a hierarchical galaxy formation scenario. The timescales for the formation and the coalescence of black hole binaries are still poorly…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 M. Dotti , A. Sesana , R. Decarli

We present a semi analytic forecast for the detection of intermediate mass black hole (IMBH) binaries with the space based detectors LISA (millihertz band) and AMIGO (deci hertz band). A redshift dependent population model is built from…

General Relativity and Quantum Cosmology · Physics 2025-07-10 Marcelo M. Lapola , Oswaldo D. Miranda

In this paper we study the evolution of a primordial black hole binary (BHB) in a sample of over 1500 direct-summation $N-$body simulations of small-and intermediate-size isolated star clusters as proxies of galactic open clusters. The BHBs…

Astrophysics of Galaxies · Physics 2018-12-19 S. Rastello , P. Amaro-Seoane , M. Arca-Sedda , R. Capuzzo-Dolcetta , G. Fragione , I. Tosta e Melo

We have investigated, both analytically and numerically, accreting supermassive black hole binaries as they inspiral due to gravitational radiation to elucidate the decoupling of binaries from their disks and inform future multi-messenger…

High Energy Astrophysical Phenomena · Physics 2026-04-27 Alexander J. Dittmann , Geoffrey Ryan , M. Coleman Miller

The Galaxy is suspected to contain hundreds of millions of binary white dwarf systems, a large fraction of which will have sufficiently small orbital period to emit gravitational radiation in band for space-based gravitational wave…

General Relativity and Quantum Cosmology · Physics 2013-05-29 Tyson B. Littenberg

We compute the expected low-frequency gravitational wave signal from coalescing massive black hole (MBH) binaries at the center of galaxies. We follow the merging history of halos and associated holes via cosmological Monte Carlo…

Astrophysics · Physics 2009-11-10 A. Sesana , F. Haardt , P. Madau , M. Volonteri

The direct measurement of gravitational waves is a powerful tool for surveying the population of black holes across the universe. The first gravitational wave catalog from LIGO has detected black holes as heavy as $\sim50~M_\odot$,…

General Relativity and Quantum Cosmology · Physics 2020-06-09 Karan Jani , Deirdre Shoemaker , Curt Cutler
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